loongson/pypi: links for avmstat

loongson/mirror avmstat-4.0.tar.gz
loongson/mirror avmstat-3.2.tar.gz
loongson/mirror avmstat-3.1.tar.gz
loongson/mirror avmstat-3.0.tar.gz
loongson/mirror avmstat-2.0.tar.gz
loongson/mirror avmstat-1.3.tar.gz
loongson/mirror avmstat-1.2.tar.gz
loongson/mirror avmstat-1.1.tar.gz